Network General Training - 04 Understanding the TCP/IP I

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Network General Training - 04 Understanding the TCP/IP I

Post # 1 by admin » 2015-01-29 14:13

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Understanding the TCP/IP Internet Layer

Internet Protocol Characteristics

Operates at network layer of OSI
Connectionless protocol
Packets treated independently
Hierarchical addressing
Best-effort delivery
No data-recovery features

01.png


Why IP Addresses?

They uniquely identify each device on an IP network.
Every host (computer, networking device, peripheral) must have a unique address.
Host ID:
-Identifies the individual host
-Is assigned by organizations to individual devices

02.png

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Re: Network General Training - 04 Understanding the TCP/IP I

Post # 2 by admin » 2015-01-29 14:28

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IP PDU Header

03.png


IP Address Format: Dotted Decimal Notation

04.png
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Re: Network General Training - 04 Understanding the TCP/IP I

Post # 3 by admin » 2015-01-29 14:31

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IP Address Classes: The First Octet

05.png


IP Address Ranges

06.png


Reserved Address

07.png


Public IP Addresses

09.png


Private IP Addresses

10.png
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Re: Network General Training - 04 Understanding the TCP/IP I

Post # 4 by admin » 2015-01-29 15:57

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DHCP

11.png


DNS
-Application specified in the TCP/IP suite
-A way to translate human-readable names into IP addresses

12.png


Network Connection

13.png
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Re: Network General Training - 04 Understanding the TCP/IP I

Post # 5 by admin » 2015-01-29 15:59

IP network addresses consist of two parts: the network ID and the host ID.

IPv4 addresses have 32 bits that are divided into octets and are generally shown in dotted decimal form (for example, 192.168.54.18).

When written in a binary format, the first bit of a Class A address is always 0, the first 2 bits of a Class B address are always 10, and the first 3 bits of a Class C address are always 110.

Certain IP addresses (network and broadcast) are reserved and cannot be assigned to individual network devices.

Internet hosts require a unique, public IP address, but private hosts can have any valid private address that is unique within the private network.

DHCP is used to assign IP addresses automatically, and also to set TCP/IP stack configuration parameters such as the subnet mask, default router, and DNS servers.

DNS is an application that is specified in the TCP/IP suite, providing a means to translate human-readable names into IP addresses.

Host provides tools that can be used to verify the IP address of the host:
-Network connections
-IPCONFIG

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